send_email

SERVERLocal SOURCElocal-mcp

Medium RISK CLASS

Category Write

Parameters 92 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-local-mcp-local-mcp/send-email.md

WHAT IT DOES

What send_email does on Local

AI agents use send_email to create or update resources in Local, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Local environment.

Parameter	Type	Required
`cc`	string	—
`to`	string	Yes
`bcc`	string	—
`body`	string	—
`from`	string	—
`confirm`	boolean	—
`subject`	string	Yes
`html_body`	string	—
`attachments`	string	—

Parameters from the server's own tool schema.

RISK

Why send_email is rated Medium

This tool creates and sends emails, which is a Write operation (creates new data/communications). It is not Read (no retrieval), not Execute (not running arbitrary code), not Destructive (emails sent are not irreversibly deleted from user's control), not Financial.

From the tool's definition Tool description explicitly states 'Composes and sends via Mail.app' and 'sends an email from an account configured in the Mac's Apple Mail', indicating irreversible creation of outbound communications.

Risk signalsAccepts raw HTML/template content (body)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs send_email safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Local, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For send_email, this is the rule to start with:

send_email Rate-limited

send_email stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "send_email": {
      "limits": [
        {
          "counter": "send_email_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Local, apply this rule, and every send_email call is checked against it from then on.

FAQ

Questions about send_email

What does the send_email tool do? +

Use this when the user wants to send an email from an account configured in the Mac's Apple Mail. Composes and sends via Mail.app; supports plain text or HTML body. For sending from a Microsoft 365 account NOT added to Mail.app, use m365_send_email. Pass from to send from a specific configured Mail.app account instead of the default sender. Pass attachments as a comma-separated list of absolute file paths to attach files. It is categorised as a Write tool in the Local MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does send_email accept? +

send_email accepts 9 parameters: cc, to, bcc, body, from, confirm, subject, html_body, attachments. Required: to, subject. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on send_email? +

Register the Local MCP server in PolicyLayer and add a rule for send_email: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Local. Nothing to install.

What risk level is send_email? +

send_email is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit send_email? +

Yes. Add a rate_limit block to the send_email rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block send_email completely? +

Set action: deny in the PolicyLayer policy for send_email. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides send_email? +

send_email is provided by the Local MCP server (local-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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